Swagger : Swagger is a powerful open source framework backed by a large ecosystem of tools that helps you design, build, document, and consume your RESTful APIs...
The CMS Matrix : CMSmatrix lets you easily compare the features in over 1200 content management system products. Check the boxes next to the software you're interested...
JSON Schema : JSON Schema is a vocabulary that allows you to annotate and validate JSON documents.
CSSdoc : This is a draft to bring automatic documentation to CSS files, like its known for JavaScript and PHP files through JavaDoc/DocTags.
This guide describes a set of HTTP+JSON API design practices, originally extracted from work on the Heroku Platform API.